LISTEN 
Libby Purves meets photojournalist Paul Conroy and composer Errollyn Wallen.
Latest - Series 3
Ivan Hewett explores how different musical keys seem to have distinct characteristics and create specific moods
4/5 Ivan Hewett talks with French horn player Roger Montgomery about the key of F major.
5/5 Ivan Hewett is joined by pianist Peter Donohoe to explore the key of C minor.
3/5 Ivan is joined by violinist, Prof Paul Robertson, to explore the ecstatic key of E major.
Sat 3 Nov 2012 15:45 BBC Radio 4
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